|1,200,000yen(around the 1991 time)
L which supplies without a stain the technology
which it can have in quest of a true stereophonic, and can also be said to be
the origin of a stereophonic
The highest-class stereo preamplifier which
aimed at the "stereo transmit error zero" which reproduce the sound from R as a
The mono-construction structure where it became
independent completely is adopted from a power cord to the input/output terminal
of a rear surface panel.
furthermore, right and left -- the thorough
analysis of the magnetic field in the set which has on a homogeneous play, a
temperature, the oscillation, etc. is conducted making full use of the newest
instrumentation equipment, all the parts including adoption of a newly developed
part are considered as a right-and-left independent symmetrical type layout, and
homogeneous-ization of the transmit is attained.
consideration is carried out in order to attain stereo transmits error zero,
such as adoption of simple-izing of a signal path, and the remote control system
in a set.
The magnetism generated from a power transformer or a
smoothing capacitor also affects a propagation circuit, generates an induction
noise, and degrades a tone quality. Paying attention to this influence,
equalization of the measure against a magnetic shield of main component partses,
such as a power transformer of low flux density and a development of the
capacitor which cancels a magnetism, and the magnetic distribution in a set is
The newly developed low flux density transformer and the capacitor (complimentary
capacitor pair) of ± pair which negates a mutual magnetism are adopted.
Furthermore, vibration proof and the measures against a vibration
suppression, such as an aluminum die-casting chassis which realized
floating-izing of a printed-circuit board and absent-resonance-ization, are
Moreover, in order to correspond also to deformation by the heat of a
chassis, the influence on the tone quality by mechanical members, such as a
layout of each part in consideration of the influence of adoption of the chassis
which calculated stress, heat deformation, etc., is solved, and it corresponds.
In consideration of the property of a conductor that a transition of a
temperature turns into a transition of a resistance value affecting a tone
quality, a control of a heat dissipation is begun, according to the suitable
layout of the part used as a heat source, the inside of a set is made into a
temperature environment like a thermostatic oven, and homogeneous-ization of a
sound on either side is attained.
In order that right and left may
secure the independence of the perfect mono-construction which became
independent completely, the volume and the function switch also adopted the
remote control in a set, and the clear separation on either side is realized.
Circuitry has one-channel 2 amplifier 2 buffer amplifier composition.
In order to drive an input to the volume and Rec output of a generous
high-impedance by a low-impedance,Installing [ and also ] buffer amplifier
between the input selector, between volumes and a volume, and the phase
switchpoint, two flat amplifier has adopted the amplifying circuit by aluminum
high Brit IC.
In order that a power-source part may become independent
to three transformers for right and left and a control and may eliminate the
influence on a tone quality, the power transformer which operates with low flux
density is developed newly and used for it. Moreover, the occurrence of the
noise is suppressed by setting up operate on the good point of a linearity.
Furthermore, a smoothing capacitor develops newly the complimentary
capacitor pair where each magnetic field cancels mutually and which it suits
paying attention to the magnetic field which is a positive and negative side and
is generated, and is suppressing the influence which a magnetic field has on a
In order to eliminate a noise thoroughly and to secure the
purity of the signal from the source, the input circuit has adopted the separate
grounding circuitry which turns on and off simultaneously not only the hot side
but the grounding side. This flows in from an earth line, and also the noise
from an equipment is cut.
Aluminum with the outstanding thermal
conductivity and a shielding property is used for the substrate of the hybrid IC
adopted as the amplification part of flat amplifier. The influence of the tone
quality on the heat which causes a tone-quality failure by this, or a magnetism
is put into practice and suppressed.
The printed-circuit board which is
easy to be influenced by oscillation was floating-ized from the holder by the
dumping material of the special rubber vibration insulator, and the influence of
the tone quality on an oscillation is cut.
In order to obtain the
independence of each channel, and symmetric property on either side, the remote
control system in a set was adopted as the change of a volume and a function, and reservation of an independence on either side is realized.
control unit of the front panel is operated manually, the volume and function
circuit changing switch which have been arranged at the set rear will operate by
drive of a motor, and will be set to the position of hope.
not operating it, the generator for motor drives is set to being turned off, and
the influence on a tone quality is cut.
In order to reproduce the
outstanding tone quality, he is examining each of component partses carefully, and the oxygen-free-high-conductivity-copper shielding wire of 99.99% of a
purity is used for signal path product-line material.
In order to supply
energy to each of three transformers direct, the
oxygen-free-high-conductivity-copper quality very-thick power cord of six cores
It also insulates doubly and using carbon for the color pigment
of an insulating material moreover etc. also supports the influence on the tone
quality by a pigment.
||Phono man month: 2.5mV / 50kohm
disk, Tuner, Line1, 2, 3, 4 and 5, Tape play1, Tape2:150mV/50kohm
Balance in 1, 2:150mV/600 ohm
|An Output voltage/impedance
||Tape rec1, 2:150mV / 1kohm
Output2(Balance): 1V/200 ohm
|Maximum output level
(0.01% of a
distortion, 20Hz - 20kHz)
|Tape rec1 and more than 2:12V (at the time
Line4 and more than 5 out:12V (at the time of Phono)
Output1:5V / 600ohm
Output2(Balance): More than 3V / 600ohm. More than 5V/10kohm
|Phono maximum permissible input
||Phono man month: 200mV or more (1kHz, 0.01%
||70W (Electrical Appliance and Material
||Width 460x height 158x depth of 446mm